Hey there... I am sorry that you're going through this. I know first hand that it's the worst feeling in the world and can control your life some times...after all, when you're hurt, frustrated and emotional its hard to move forward positively and grow the way you're meant to. I have been in several relationships that have had me feeling the way you are. I have had an open heart and open mind which has lead to a lot of hurt and failed attempts to say the least. With that said, I think I can help...
I've learned that women being nurturers tend to want to always be the first to try and "fix" it or be the understanding one, the one who wants to be the pleaser in all areas. This is NOT a bad thing but it CAN be if you don't know when to turn it off. People can get spoiled by this and will become accustomed to you always bending over backwards and taking the heat and it can lead to you being taken advantage of. Never let anyone make you feel guilty about anything you're uncomfortable with. If a man appreciates and respects you, he will respect that you are a caring person and he will treat the issue with a mutual respect and effort in making it right WITH you. The thing is, you want to meet a man who GETS you and never makes you feel down about who you are, what makes you happy, upset, uncomfortable, etc. A man essentially has always been known to be the "provider" and this doesn't necessarily mean the money maker...it means he provides protection, love & respect for his woman and whatever else she may need to be happy IF he truly adores you and cant see himself without you. You don't want to spend the rest of your life with anything less than this. Trust me.
So...going back to what you said regarding his response to you and how he seems angry, frustrated, annoyed, etc., these are all signs to me that you are giving more than you are receiving and he is use to you being "weak" and saying sorry or wanting to fix it. If I were you, I would back off in the sense that you don't ask anything of him anymore, don't apologize for feeling uncomfortable (by the way you are completely right about feeling uncomfortable with what he was asking of you- intimacy in the same room as his daughter after she falls asleep & in the pool). I would have been livid. Anyhow, don't give him all of you anymore if he is going to treat you this way. People usually want what they cant have, realize what they had once its gone...you know what I mean? And if it fails, its ok because think of the lessons you will learn from all of this and the red flags to avoid going forward in any new relationship? Sometimes, these things happen to us because there are still lessons to be learned... You deserve only to be treated with understanding, sensitivity & respect. This goes both ways...
Communication, trust, love & loyalty are key in making it work... if they are missing, it will only get harder. Also weigh out the pros and cons, if the list of cons exceeds the list of pros...well you know what to do...
hang in there, be strong and stay confident in yourself and your true feelings.